Messages in this thread | | | From | <> | Subject | [PATCH 0/4] gpio: dwapb: Fix reference clocks usage | Date | Fri, 6 Mar 2020 16:24:44 +0300 |
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From: Serge Semin <fancer.lancer@gmail.com>
There is no need in any fixes to have the Baikal-T1 SoC DW GPIO controllers supported by the kernel DW APB GPIO driver. It works for them just fine with no modifications. But still there is a room for optimizations there.
First of all as it tends to be traditional for all Baikal-T1 SoC related patchset we replaced the legacy plain text-based dt-binding file with yaml-based one. Baikal-T1 DW GPIO port A supports a debounce functionality, but in order to use it the corresponding reference clock must be enabled. We added support of that clock in the driver and made sure the dt-bindings had its declaration. In addition seeing both APB and debounce reference clocks are optional, we replaced the standard devm_clk_get() usage with the function of optional clocks acquisition.
This patchset is rebased and tested on the mainline Linux kernel 5.6-rc4: commit 98d54f81e36b ("Linux 5.6-rc4").
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Signed-off-by: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> Cc: Maxim Kaurkin <Maxim.Kaurkin@baikalelectronics.ru> Cc: Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru> Cc: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru> Cc: Ekaterina Skachko <Ekaterina.Skachko@baikalelectronics.ru> Cc: Vadim Vlasov <V.Vlasov@baikalelectronics.ru> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Paul Burton <paulburton@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Hoan Tran <hoan@os.amperecomputing.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-gpio@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org
Serge Semin (4): dt-bindings: gpio: Replace DW APB GPIO legacy bindings with YAML-based one dt-bindings: gpio: Add DW GPIO debounce clocks bindings gpio: dwapb: Use optional-clocks interface for APB ref-clocks gpio: dwapb: Add debounce reference clock support
.../bindings/gpio/snps,dw-apb-gpio.yaml | 140 ++++++++++++++++++ .../bindings/gpio/snps-dwapb-gpio.txt | 65 -------- drivers/gpio/gpio-dwapb.c | 41 +++-- 3 files changed, 166 insertions(+), 80 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpio/snps,dw-apb-gpio.yaml delete mode 100644 Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt
-- 2.25.1
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